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Models of short fatigue crack propagation, taking into account the non-monotonic
crack growth rate and predicting an existence of one or several threshold stress intensity factors,
are considered. The models are formulated on the base of Leonov-Panasyuk-Dugdale formalism
with using the non-local fracture criterion. A comparison of the obtained results with experimental
data are given and discussed.
Keywords: fatigue crack; crack propagation; crack growth rate; non-local fracture criterion. |
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